Flashcards in Week 3 Venipuncture Skills Training Deck (13)
what are four indication for blood draw?
amount of cells, chemistry levels, drug levels, infection
what are some complications to blood draw? 5
bruising/hematoma, infections, arterial puncture, limb precautions, hemolysis
To limit/prevent bruising what can you do?
1. dont leave tourniquet on for more than a minute
2. remove tourniquet as last tube is filling
3. remove specimen tube
4. retract needle apropriately
what causes hemolysis during blood draw? 2
improper specimen handling, needle size too small (use 21 G or 23 G)
what is the function of the tourniquot?
blocks venous return to heart causing veins to dilate
what is the rationale for leaving the tourniquet on for less than one minute?
prevents formation of hematoma which would cause erroneously high lab values
what are the types of needle used in blood draw?
direct draw needle and butterfly needle
where can the two type of needles be used?
direct draw: only in the antecubital region
butterfly needle: used anywhere
what is the best site for blood draw?
what are three obsolete techniques of blood draw
taping the vein, having the patient pump fist, blind sticking
how should the needle be when you draw blood? angle? bevel?
15-30 degrees with bevel up
if using a butterfly needle what must you use?
a discard tube to clear air from the needle's tubing